Yard vacuum



FIG. 1 is a perspective view of a head of a yard vacuum cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof; and,

FIG. 6 is a top plan view thereof.

The bottom of the head of the yard vacuum forms no part of the claimed design. 

The ornamental design for a yard vacuum, as shown. 